import java.util.ArrayList;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: qian
 * Date: 2023-02-13
 * Time: 12:21
 */

class A{
    protected B[] b;

}
interface B{

}
public class test20 extends A {
    public test20(){
        this.b=new B[]{};
    }
    public void test()
    {
        this.b=new B[10];
    }
    public static void main(String[] args) {

    }
}
